Heater assembly

Abstract

A heater assembly for a container such as a cooking vessel includes a heating coil in a tubular heater casing, with a connecting pin member connected to the heating coil and projecting through an insulating sleeve mounted to the end of the casing. A plug connecting pin is mounted to the part of the pin member projecting from the insulating sleeve. The end of the casing is butted directly against the insulating sleeve, and a casting material is cast around parts of the plug pin, the casing and the insulating sleeve to form an assembly thereof.

I claim: 
     
       1. A heater assembly for a container, comprising a tubular casing having an end portion and a heating resistance wire coil embedded in a heat-resistant insulating material in said casing, an insulating sleeve on said end portion of the casing, said end portion being supported directly against said insulating sleeve, a connecting pin member which is operatively connected to the heating resistance wire coil and which projects outwardly therefrom through the insulating sleeve, a plug connecting pin on the portion of the pin member projecting out of the insulating sleeve, and a casting material around respective parts of the plug connecting pin, the tubular casing and the insulating sleeve to form an assembly thereof. 
     
     
       2. An assembly as set forth in claim 1 wherein said plug connecting pin has a peripheral edge which butts and is supported directly against said insulating sleeve. 
     
     
       3. An assembly as set forth in claim 1 wherein said plug connecting pin is pressed to the pin member. 
     
     
       4. An assembly as set forth in claim 1 wherein said insulating sleeve has a first recess means for receiving the end portion of said tubular casing, and a second recess means for receiving a portion of said plug connecting pin, said first and second recess means providing depressions around said tubular casing end portion and said plug connecting pin portion for receiving said casting material. 
     
     
       5. An assembly as set forth in claim 1 wherein said tubular casing has two ends, and a respective sleeve, connecting pin member, plug connecting pin and casting material are operatively associated with each said end. 
     
     
       6. A tubular heater assembly for a vessel, comprising a tubular casing having an end portion, a heating resistance wire coil embedded in heat-resistant insulating material in the casing, an insulating sleeve on the end portion of the casing, a connecting pin member connected to the resistance wire coil and projecting out of the casing through the sleeve, and a plug connecting pin means disposed on the connecting pin member, for connection to an electrical plug, the improvement that the end surface of the casing end portion is supported directly against the sleeve by a peripheral edge of said plug connecting pin bearing against the sleeve and by the plug connecting pin being pressed on said connecting pin member, and that a casting material is cast around parts of the sleeve, the plug connecting pin and the casing.